Jujutsu Kaisen is a Japanese manga/anime series that follows the story of high school student Yuji Itadori, as he joins a secret organisation of Jujutsu Sorcerers in order to kill a powerful Curse named Ryomen Sukuna, of whom Yuji becomes the host.
Suguru Geto is an antagonist in both the Jujutsu Kaisen series and its prequel Jujutsu Kaisen 0: Jujutsu High. He was originally a student of Masamichi Yaga’s alongside Satoru Gojo and Shoko Ieiri at Tokyo Jujutsu High. His experiences as a jujutsu sorcerer bred a deep hatred for non-sorcerers, leading to an incident where Suguru massacred over a hundred civilians in a single night. He was expelled from Jujutsu High and came to be known as the worst of all curse users.